Re: clever way to do a product?
- To: mathgroup at smc.vnet.net
- Subject: [mg27188] Re: clever way to do a product?
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 9 Feb 2001 03:10:33 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <95tqsr$mb3@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
where is the "j" in a dot product
Sum[v[[i]]*w[[i]],{i,1,n}]
??
Otherwise Dot[Drop[v,{j}],Drop[w,{j}]] will do it.
Regards
Jens
Tim Ebringer wrote:
>
> Does anyone know of a clever way where I can calculate a product, where i
> runs from 1 to n, except where i=j?
>
> Tim.